Question

1. which of the following is an example of a normal physiologic process that uses a positive feedback loop? a. blood pressure regulation b. childbirth c. regulation of fluid balance d. temperature regulation 20. what is the position of the body when it is in the

ormal anatomical position?\ a. the person is prone with upper limbs, including palms, touching sides and lower limbs touching at sides. b. the person is standing facing the observer, with upper limbs extended out at a ninety - degree angle from the torso and lower limbs in a wide stance with feet pointing laterally c. the person is supine with upper limbs, including palms, touching sides and lower limbs touching at sides. d. none of the above 21. to make a banana split, you halve a banana into two long, thin, right and left sides along the a. coronal plane b. longitudinal plane c. midsagittal plane d. transverse plane

Explanation:

1. Positive - feedback loops enhance or amplify changes. Childbirth is a physiological process that uses a positive - feedback loop. As the baby's head presses against the cervix, it stimulates the release of oxytocin, which causes stronger contractions, further stimulating oxytocin release. Blood pressure regulation, fluid balance regulation, and temperature regulation are examples of negative - feedback loops that maintain homeostasis.
2. The normal anatomical position is when the person is standing facing the observer, with the upper limbs at the sides and the palms facing forward, and the lower limbs together with the feet pointing forward. Options a and c are incorrect postures.
3. Halving a banana into two long, thin, right and left sides is along the midsagittal plane which divides an object into equal right and left halves. The coronal plane divides into front and back sections, the longitudinal plane is a general term for planes running length - wise but not necessarily into equal halves, and the transverse plane divides into upper and lower sections.

Answer:

1. B. childbirth
2. None of the above (The correct position is standing upright, facing forward, with arms at sides and palms forward, and feet together)
3. C. midsagittal plane