Recall what you know about hypertonic, hypotonic, and isotonic solutions. When an environment is hypotonic, what happens to the cell?(1 point)
Responses
The environment has more solute, so solvent moves from inside the cell to outside, causing the cell to shrink.
The environment has more solute, so solvent moves from inside the cell to outside, causing the cell to shrink.
The cell has more solute, so solvent moves from inside the cell to outside, causing the cell to shrink.
The cell has more solute, so solvent moves from inside the cell to outside, causing the cell to shrink.
The environment has more solute, so solvent moves from outside the cell to inside, causing the cell to swell.
The environment has more solute, so solvent moves from outside the cell to inside, causing the cell to swell.
The cell has more solute, so solvent moves from outside the cell to inside, causing the cell to swell.
The correct response is: hypertonic environment. Saltwater fish are adapted to living in a hypertonic (high solute) environment such as the ocean, where the concentration of solutes is higher outside their bodies.
The correct response is: nucleus. The genetic material of eukaryotic cells is stored inside the nucleus.
The correct response is: decodes the sequence of bases on the mRNA and then creates specific proteins. Ribosomes in eukaryotic cells are responsible for protein synthesis by decoding the sequence of bases on mRNA and using it as a template to assemble amino acids into proteins.
The correct response is: they store water. The central vacuole of a plant cell is primarily responsible for storing water, as well as various nutrients, ions, and waste products.
The correct response is: nerve cells. Nerve cells, or neurons, generally have a high concentration of mitochondria. This is because neurons require large amounts of energy to carry out their functions, such as transmitting electrical impulses throughout the body. Mitochondria are the powerhouse of the cell and produce ATP (adenosine triphosphate), which is the energy currency of the cell.
The correct response is: Golgi apparatus. The Golgi apparatus is responsible for packing proteins and other materials into vesicles. It modifies, sorts, and packages molecules, such as proteins and lipids, into vesicles for transport to their appropriate destinations within or outside the cell.
The correct response is: receiving and processing stimuli from the body. The nervous system is responsible for receiving and processing stimuli from the body and the environment. It allows for the transmission of signals and communication between different parts of the body, enabling appropriate responses and coordination of bodily functions.
The correct response is: connect the mouth with the stomach. The esophagus is a muscular tube that connects the mouth with the stomach. It allows for the passage of food and liquids from the mouth to the stomach for digestion and further processing. The primary function of the esophagus is to facilitate the transport of food during the swallowing process.
The correct response is: The environment has more solute, so solvent moves from outside the cell to inside, causing the cell to swell.
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For what kind of external environment is a saltwater fish adapted?(1 point)
Responses
hypotonic environment
hypotonic environment
osmotonic environment
osmotonic environment
isotonic environment
isotonic environment
hypertonic environment
hypertonic environment
The genetic material of the eukaryotic cell is stored inside which organelle?(1 point)
Responses
endoplasmic reticulum
endoplasmic reticulum
nucleus
nucleus
ribosome
ribosome
Golgi apparatus
Which of the following best describes the function of the ribosomes in eukaryotic cells?(1 point)
Responses
decodes the sequence of bases on the mRNA and then creates specific proteins
decodes the sequence of bases on the mRNA and then creates specific proteins
makes lipids and steroids that will be used in the production of membranes and hormones
makes lipids and steroids that will be used in the production of membranes and hormones
modifies proteins that require specific attachments of sugars or lipids and packages proteins for export
modifies proteins that require specific attachments of sugars or lipids and packages proteins for export
energy-producing structure of the cell and location of cellular respiration
What is the unique function of central vacuoles in a plant cell?(1 point)
Responses
they store enzymes
they store enzymes
they store pigments
they store pigments
they store ribosomes
they store ribosomes
they store water
they store water
Which type of cells have a high concentration of mitochondria?(1 point)
Responses
heart cells
heart cells
blood cells
blood cells
skin cells
skin cells
nerve cells
As you have learned, cells contain structures called organelles.
What organelle is responsible for packing proteins and other materials into vesicles?(1 point)
Responses
mitochondria
mitochondria
cytoplasm
cytoplasm
Golgi apparatus
Golgi apparatus
endoplasmic reticulum
endoplasmic reticulum
The nervous system is responsible for(1 point)
Responses
defending against disease like the flu or common cold.
defending against disease like the flu or common cold.
breaking down food and extracting nutrients.
breaking down food and extracting nutrients.
exchanging gases between the body and the environment.
exchanging gases between the body and the environment.
receiving and processing stimuli from the body.
Which is the function of the esophagus?(1 point)
Responses
connect the mouth with the stomach
connect the mouth with the stomach
absorb nutrients from food
absorb nutrients from food
receive and chew food
receive and chew food
release digestive enzymes
Summarize the functions of the nervous system.(1 point)
Responses
The nervous system controls the circulatory system by sending signals to the lungs, telling them to expand and inhale oxygen.
The nervous system controls the circulatory system by sending signals to the lungs, telling them to expand and inhale oxygen.
The nervous system controls the respiratory system by sending signals to the muscles, telling them to flex and move limbs.
The nervous system controls the respiratory system by sending signals to the muscles, telling them to flex and move limbs.
The nervous system controls the muscular system by sending signals to the blood, telling it to move throughout the body.
The nervous system controls the muscular system by sending signals to the blood, telling it to move throughout the body.
The nervous system controls the digestive system by sending signals to the stomach, telling it to contract and digest food.
The nervous system controls the digestive system by sending signals to the stomach, telling it to contract and digest food.
The correct response is: The nervous system controls the body's functions and coordinates the communication between different parts of the body. It receives and processes stimuli from the body and the environment, allowing for the transmission of signals and appropriate responses. It plays a role in controlling and coordinating movements, regulating bodily functions, and maintaining homeostasis.
Summarize the functions of the nervous system.(1 point)
Responses
The nervous system controls the circulatory system by sending signals to the lungs, telling them to expand and inhale oxygen.
The nervous system controls the respiratory system by sending signals to the muscles, telling them to flex and move limbs.
The nervous system controls the muscular system by sending signals to the blood, telling it to move throughout the body.
The nervous system controls the digestive system by sending signals to the stomach, telling it to contract and digest food.
The correct response is: The nervous system controls and coordinates the body's functions by sending and receiving electrical signals. It enables communication between different parts of the body and allows for the regulation of bodily processes, such as movement, sensation, and coordination.
Which animal is often used to model human body systems?(1 point)
Responses
rabbit
rabbit
sheep
sheep
pig
pig
cow
cow
The correct response is: mouse. Mice are often used as animal models in scientific research to study various aspects of human body systems, including physiology, genetics, and disease. Their genetic similarities to humans, ease of breeding and maintenance, and short reproductive cycles make them valuable for studying human biology and developing new treatments.
Compare types of models. Which model best illustrates the formation of blood cells?(1 point)
Responses
dissected pig
dissected pig
plastic bone
plastic bone
photograph of a bone
photograph of a bone
computer-generated model
The correct response is: computer-generated model. While a dissected pig may provide general anatomical information, a plastic bone or a photograph of a bone may not demonstrate the dynamic process of blood cell formation. A computer-generated model, on the other hand, can depict the complex cellular interactions and molecular processes involved in the formation of blood cells more accurately. It can show the differentiation of stem cells into various blood cell types and the interaction with other cells and factors in the bone marrow environment.
describe the human respiratory system and its functions
The human respiratory system is a complex network of organs and tissues involved in the process of respiration, which is the exchange of oxygen and carbon dioxide between the body and the environment. The main organs of the respiratory system include the nose, nasal cavity, throat (pharynx), voice box (larynx), windpipe (trachea), bronchi, bronchioles, and lungs.
Functions of the respiratory system include:
1. Breathing: The respiratory system allows for the intake of oxygen-rich air and the release of carbon dioxide through the process of breathing. Oxygen is taken in during inhalation, and carbon dioxide is expelled during exhalation.
2. Gas Exchange: The respiratory system facilitates the exchange of gases between the lungs and the bloodstream. Oxygen from the inhaled air enters the bloodstream and is transported throughout the body, providing oxygen to cells for energy production. Carbon dioxide, a waste product, is removed from the bloodstream and exhaled.
3. Filtration and Humidification: The respiratory system filters out harmful substances, such as dust and pollutants, and humidifies the inhaled air to prevent damage to delicate lung tissues.
4. Speech and Phonation: The respiratory system, along with the larynx and vocal cords, plays a crucial role in speech production and phonation. Air passing through the vocal cords creates sound, which is then shaped into speech by the mouth and other articulatory organs.
5. Regulation of pH: The respiratory system helps maintain the acid-base balance in the body by controlling the levels of carbon dioxide in the bloodstream. Exhaling carbon dioxide helps regulate blood pH.
Overall, the respiratory system is essential for providing oxygen to the body's cells, eliminating carbon dioxide, and maintaining homeostasis. It plays a crucial role in maintaining proper bodily functions and overall health.