The latest technology for studying neurons is called optogenetics
a. True
b. False
Indicate whether the statement is true or false
True
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Eating a very salty snack makes you thirsty because it
a. causes decreased ECF volume b. decreases the osmolarity of the ECF c. inhibits the hypothalamic osmoreceptors d. stimulates the hypothalamic osmoreceptors e. immediately causes more urine output
Which is TRUE about sperm delivery?
A. Most of the ejaculated sperm arrive in the vicinity of the ovum (if there is one). B. Sperm transport through the cervix is made possible by actions of progesterone on the cervical mucus. C. Of the several hundred million sperm in an ejaculation, only about 100 to 200 reach the fallopian tube. D. Sperm are able to fertilize an egg from the instant they arrive in the female reproductive tract. E. Sperm can survive for up to 2 weeks in the mucus of the cervix.
Costal cartilages connect which of the following?
A. The floating ribs with xiphoid process B. The true ribs with the scapula C. The false ribs with the viscera and peritoneum D. The clavicles with the sternum E. The ribs with the sternum
Answer the following statements true (T) or false (F)
1. A passive process that allows passage of small inorganic ions and lipid-soluble materials in all cell types is called diffusion. 2. passive process that involves the movement of water (solvent) molecules toward solute concentrations across a membrane is called facilitated diffusion. 3. Organelles that produce most of the ATP required by the cell are called ribosomes. 4. The endoplasmic reticulum is the organelle responsible for the synthesis of organic products and provides for intracellular storage and transport. 5. The smooth endoplasmic reticulum is the organelle that packages secretory products and renews and modifies plasmalemmae.