32. To function properly, a neuron must maintain a
a. membrane potential
b. neurotransmitter
c. negative charge on the inside
d. positive charge on the inside
I'm stuck between C and D...
34. Hormones are essential to maintaining homeostasis mainly because
a. they catalyze specific chemical reactions in brain cells
b. the body requires them for digesting food
c. they cause specific responses in specific cells
d. they act faster than nerve impulses
C?
35. Which of the following is TRUE?
a. It was recently discovered that the pituary gland doesn't actually do anything
b. The hypothalamus is responsible for controlling the activity of the pituary gland
c. The pituary gland controls the hypothalamus, which in turn controls the other glands
d. Hormones of the other endocrine glands of the body activate the pituary gland
Not sure...
Thanks
-MC
32. To determine the correct answer between option C and D, it is important to understand the basic functioning of a neuron. Neurons are specialized cells responsible for transmitting signals in the nervous system. One critical aspect of their function is maintaining a voltage difference across their cell membrane, known as the membrane potential.
When a neuron is at rest, it has a negative charge on the inside as compared to the outside. This negative charge is maintained by the movement of ions across the cell membrane. Option C, "negative charge on the inside," correctly identifies this important characteristic of a neuron.
On the other hand, option D, "positive charge on the inside," is incorrect. A neuron at rest does not have a positive charge on the inside.
Therefore, the correct answer is option C: negative charge on the inside.
34. Hormones are chemical messengers secreted by endocrine glands that regulate various physiological processes in the body. To determine the correct answer between the options given, we need to understand the role of hormones in maintaining homeostasis, which refers to the body's internal balance.
Option C, "they cause specific responses in specific cells," correctly describes the role of hormones in maintaining homeostasis. Hormones bind to specific target cells and trigger specific responses, thereby helping to regulate and balance various bodily functions.
Options A, B, and D are incorrect because they do not accurately describe the main role of hormones in maintaining homeostasis.
Therefore, the correct answer is option C: they cause specific responses in specific cells.
35. To determine the correct answer, let's analyze each option:
Option A, "It was recently discovered that the pituitary gland doesn't actually do anything," is incorrect. The pituitary gland plays a crucial role in regulating many bodily functions by producing and releasing hormones.
Option B, "The hypothalamus is responsible for controlling the activity of the pituitary gland," is correct. The hypothalamus, located in the brain, controls the anterior and posterior pituitary glands by releasing hormones that stimulate or inhibit the release of pituitary hormones.
Option C, "The pituitary gland controls the hypothalamus, which in turn controls the other glands," is incorrect. While the hypothalamus and pituitary gland work in close coordination, the pituitary gland does not directly control the hypothalamus.
Option D, "Hormones of the other endocrine glands of the body activate the pituitary gland," is incorrect. The pituitary gland is not primarily activated by hormones from other endocrine glands.
Therefore, the correct answer is option B: The hypothalamus is responsible for controlling the activity of the pituitary gland.