HESI A2
HESI A2 Version 1 Anatomy and Physiology Questions
Question 1 of 5
Where in the human body are most nutrients absorbed?
Correct Answer: D
Rationale:
Question 2 of 5
Which structure regulates the transport of substances in and out of a cell?
Correct Answer: C
Rationale:
Question 3 of 5
The distal end of the two bones that articulate with the carpals are broken. Which bones are these?
Correct Answer: A
Rationale:
Question 4 of 5
Which structure of the nervous system carries action potentials in the direction of a synapse?
Correct Answer: B
Rationale: The correct answer is the axon. The axon is a long, slender projection of a neuron that carries nerve impulses away from the cell body towards other neurons, muscles, or glands. Action potentials travel along the axon to the axon terminals where they lead to the release of neurotransmitters at the synapse, allowing communication with other neurons or target cells. The cell body contains the nucleus and organelles of the neuron but does not transmit action potentials. Neurons are the functional unit of the nervous system composed of the cell body, dendrites, and axon. Myelin is a fatty substance that surrounds and insulates axons, helping to speed up the transmission of nerve impulses but does not carry action potentials towards the synapse.
Question 5 of 5
Which hormone stimulates milk production in the breasts during lactation?
Correct Answer: C
Rationale: Prolactin is the hormone responsible for stimulating milk production in the breasts during lactation. It is produced by the pituitary gland and plays a crucial role in the initiation and maintenance of lactation. While norepinephrine, antidiuretic hormone, and oxytocin have roles in various physiological processes, they do not directly stimulate milk production. Therefore, the correct answer is prolactin.