which part of the nervous system controls the fight or flight response

ATI TEAS 7

Practice TEAS Science Test

1. Which part of the nervous system controls the 'fight or flight' response?

A. Central nervous system
B. Peripheral nervous system
C. Autonomic nervous system
D. Sympathetic nervous system

Correct answer: D

Rationale: The correct answer is the sympathetic nervous system. It controls the 'fight or flight' response by preparing the body for stressful situations. The central nervous system (Choice A) consists of the brain and spinal cord but does not directly control the 'fight or flight' response. The peripheral nervous system (Choice B) includes nerves outside the brain and spinal cord, while the autonomic nervous system (Choice C) regulates involuntary bodily functions but is not specific to the 'fight or flight' response.

2. Blood type is a trait determined by multiple alleles, with IA and IB being co-dominant: IA codes for A blood and IB codes for B blood, while i codes for O blood and is recessive to both. If an A heterozygote individual and an O individual have a child, what is the probability that the child will have A blood?

A. 25%
B. 50%
C. 75%
D. 100%

Correct answer: B

Rationale: If an A heterozygote (IAi) and an O individual (ii) have a child, there is a 50% chance the child will inherit the IA allele and have A blood. The A heterozygote can pass on either the IA or i allele, while the O individual can only pass on the i allele. Therefore, the possible genotypes for the child are IAi (A blood) or ii (O blood), resulting in a 50% chance of the child having A blood. Choice A (25%) is incorrect as it does not take into account the possibility of inheriting the IA allele. Choice C (75%) and Choice D (100%) are incorrect as they overestimate the probability of the child having A blood.

3. What type of sentence is "Because it was raining, the match was canceled?"

A. Simple
B. Compound
C. Complex
D. Compound-complex

Correct answer: C

Rationale: The given sentence, "Because it was raining, the match was canceled," is a complex sentence. It consists of one independent clause ('the match was canceled') and one dependent clause ('Because it was raining'). A simple sentence contains one independent clause with no dependent clauses. A compound sentence has two or more independent clauses but no dependent clauses. A compound-complex sentence has two or more independent clauses and at least one dependent clause, which is not the case here. Therefore, the correct classification for this sentence is a complex sentence.

4. Which of the following best describes the term monochromatic?

A. having one color
B. having many parts
C. having a lot of time
D. having too much heat

Correct answer: A

Rationale: The term 'monochromatic' refers to something that has only one color. Choice A, 'having one color,' is the correct description for monochromatic. Choices B, C, and D are incorrect as 'monochromatic' does not mean 'having many parts,' 'having a lot of time,' or 'having too much heat.' Monochromatic specifically conveys the idea of consisting of or using only one color, making Choice A the correct answer.

5. Which blood component is chiefly responsible for clotting?

A. Platelets
B. Red blood cells
C. Antigens
D. Plasma cells

Correct answer: A

Rationale: The correct answer is A: Platelets. Platelets are small cell fragments in the blood that play a crucial role in clotting. When there is an injury, platelets adhere to the site and release chemicals that help form a clot to prevent excessive bleeding. Red blood cells transport oxygen, antigens are substances that trigger an immune response, and plasma cells are a type of white blood cell involved in producing antibodies, none of which are primarily responsible for clotting.