Which of the following is NOT an example of homeostasis?
a
As humans age, they become more susceptible to disease and cancer.
b
When blood glucose is high, the hormone insulin reduces blood glucose.
c
When body temperature rises, nerve impulses cause sweat glands to release more sweat.
d
During rigorous exercise the heart rate increases to deliver more blood to the cells.
a
The diagram shows a beaker of water and molecules of red dye at the beginning of an experiment (Time 1) and the same beaker of water and molecules of red dye after 30 minutes (Time 2). Which of the following best explains what happened?
a
Molecules of red dye moved by active transport from a higher concentration to a lower concentration.
b
Molecules of water moved by osmosis from a lower concentration to a higher concentration.
c
Molecules of red dye moved by diffusion from a higher concentration to a lower concentration.
d
Molecules of water moved by active transport from a higher concentration to a lower concentration.
c
A student is investigating the process of osmosis. She fills a medicine dropper with red blood cells. Next, she creates a saline solution that is isotonic to the red blood cells. What will most likely happen to the red blood cells after they are placed in the solution?
a
Water will exit the cells and cause them to shrink in size.
b
Water will enter the cells and cause them to grow in size.
c
Water will neither enter or exit the cells and their sizes will remain the same.
d
Water will enter and exit the cells at a steady rate and their sizes will remain the same.
c
The image represents a human cell in an isotonic solution. Some common cellular molecules that can freely move across the plasma membrane are shown5
What do you think will happen if no energy is used?
a
Some CO2 will leave the cell.
b
Some H2O will leave the cell.
c
Some H2O will enter the cell.
d
Some O2 will enter the cell.
c
Single-celled organisms utilize organelles to maintain homeostasis, while large multicellular organisms, such as humans, use organs to maintain homeostasis. How are organelles and organs similar?
prokaryotes-vs-eukaryotes-what-are-the-key-differences-336095-1280x720_62ffcab3262fd.jpg
a
Organelles are similar in structure to organs.
b
Organelles have similar regulatory functions to organs.
c
Organs are specialized for metabolism while organelles are specialized for homeostasis.
d
Organelles are specialized for cellular respiration while organs are specialized for breathing.
a
Which of the following organelles specializes in producing energy for the cell?
a
Golgi apparatus
b
mitochondria
c
lysosome
d
endoplasmic reticulum