There is a loud crash in the room behind you and you jump. which part of your nervous system caused that response/ A. somatic nervous system?
C. central nervous system
D. sympathetic branch
E. parasympathetic branch
My teacher told me b was wrong so that's why it's missing
why are reflexes faster than typical body responses to stimuli?
A. the circuit from stimulus to response travels directly from the spinal column to the brain
B. a reflexive response involves just the somatic system
D. the circuit from stimulus to response doesn't go through the brain first
E. a reflex involves the cranial nerves which operates more quickly than other nerves
new species evolve fro older ones. Why is it difficult to demonstrate this process?
what is the surface are of an alveoli?
How is it possible for a mutation to be beneficial and what happens to it if it is?
A. a mutation by defenition is not beneficial
B. and disappear from the population
It is not possible for a mutation to be beneficial and so the mutated gene will be selected against
C. A mutation that results in a trait that improves an organisms fitness is beneficial and because it has improved fitness that mutated gene will spread in the population
D. A mutation can result in a trait that is beneficial to an individual or its offspring and it will stay within that family
D, D, C
The correct answer for the first question is D. sympathetic branch. The sympathetic branch of the autonomic nervous system is responsible for the "fight or flight" response, which includes an increase in heart rate, muscle tension, and overall alertness. When you hear a loud crash, your sympathetic branch activates, preparing your body to respond to potential danger.
Reflexes are faster than typical body responses to stimuli because the circuit from the stimulus to the response doesn't go through the brain first. The correct answer is D. In a reflexive response, the sensory neuron directly connects to the motor neuron in the spinal cord, allowing for a quicker response without the need for processing by the brain.
Demonstrating the process of new species evolving from older ones can be difficult because it occurs over prolonged periods of time and may leave limited evidence. The correct answer for this question is not provided.
The surface area of an alveoli, which are tiny air sacs in the lungs, is large due to their structure. Unfortunately, the specific surface area of an individual alveolus is not provided.
A mutation can be beneficial if it results in a trait that improves an organism's fitness. The correct answer is C. A mutation that enhances an organism's ability to survive, reproduce, or adapt to its environment is considered beneficial. When a beneficial mutation occurs, it can spread in the population through natural selection, increasing the chances of individuals with the mutated gene surviving and passing it to future generations.