The head of the sperm is covered with an enzyme-filled sac called a(n) ________, which helps the sperm penetrate an ovum at the time of fertilization. 

________ caregivers should be present when logrolling a patient to a spine board

A) Four B) Two C) One D) Six

What term is used to describe the situation when an initial asthmatic response occurs within 1 hour of exposure to an allergen followed by a delayed asthmatic response hours later?

a. Deferred dyspneic response b. Asynchronous activation response c. Biphasic response d. Bipolar response