A pistol fires a 1 g bullet with a muzzle speed of 1000 m/s. The bullet then strikes a 10 kg wooden block of a ballistic pendulum (see figure). What is the speed of the “bullet + block” system immediately after the bullet is embedded in the block?

A person is confronted by a dangerous dog. His heart begins to race and beat strongly, his pupils dilate, and his hairs stand up. These signs are the result of

The nephron is a component of which of the following body sysyems?

The Endocrine function of the Panreas produces

Which of the following is false concerning melatonin?

Calcium ions serve as messengers, often in combination with the intracellular protein

The urethra transports urine form the kidneys to the urinary bladder in the Urinary System.

In Pregnancy and Human Development what is “quickening”?

The Digestive enzyme Lipase breaks down

Histology: Identify the “A” in the below histology slide