This is a diagram of calcium homeostasis. What process is represented by "A"?
A. Vitamin D promotes calcium absorption.
B. PTH promotes calcium release into blood by osteoclast.
C. Calcium is lost in urine.
D. PTH promotes calcium reabsorption from urine.
E. Calcium is removed from blood by osteoblasts.
C
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All cells (not just animal cells) have
a. mitochondria. b. a cell membrane. c. a cell wall. d. a nucleus. e. microtubules.
This figure shows a superior view of the cranial cavity. Which number indicates the crista galli?
A. 1 B. 3 C. 9 D. 10 E. The crista galli is not labeled on this figure.
All of the following are true of olfactory pathways except
A) they project first to the mammillary bodies and then to the thalamus. B) the first synapse is in the olfactory bulb. C) information flows to the olfactory cortex, hypothalamus, and limbic system. D) they reach the forebrain without first synapsing in the thalamus. E) they exhibit a considerable amount of convergence.
A brain injury to a patient results in facial paralysis. Which descending tract is most likely affected?
A) corticospinal tract B) tectospinal tract C) rubrospinal tract D) corticobulbar tract E) reticulospinal tract