Explanation

Bone-forming cells are osteoblasts.

These cells are responsible for synthesizing and mineralizing bone during growth and healing processes.

Explanation

Immunoglobulin G (IgG) is the most abundant antibody in the human body.

It plays a crucial role in long-term immunity by recognizing and neutralizing pathogens.

IgG antibodies are produced after exposure to an antigen, such as a vaccine.

They persist in the bloodstream for an extended period, allowing the body to respond to subsequent infections with the same pathogen quickly.

IgG can also cross the placenta, providing passive immunity to newborns. 

Explanation

Testosterone, estrogen, and progesterone are derived from cholesterol, making them steroid hormones.

They are lipid-soluble, diffuse through membranes, and regulate reproduction.

Explanation

The type of nerve impulse in a non-myelinated neuron is continuous. 

In unmyelinated neurons, the action potential travels along the entire axon membrane, requiring continuous depolarization and repolarization.

Whereas in myelinated neurons, the action potential "jumps" from node to node (saltatory conduction), which is much faster. 

Explanation

Explanation

Pancreatic juice, produced by the pancreas, contains a mix of enzymes that break down:

• Proteins (pepsin, trypsin, and chymotrypsin)
• Fats (lipase)
• Carbohydrates (amylase)

Explanation

The human arm acts as a third-class lever, where the effort is applied between the fulcrum (elbow) and the load (hand).  

For example, the forearm is a 3rd class lever because the biceps pulls on the forearm between the joint (fulcrum) and the ball (load).

Using the standard terminology of levers, the forearm is the lever, the biceps tension is the effort, the elbow joint is the fulcrum, and the ball weight is the resistance.

Explanation

A complete heartbeat is called the cardiac cycle, which includes systole (contraction) and diastole (relaxation).

Together, they ensure blood is pumped and chambers are refilled.

Explanation

Explanation

Gastric juice, containing hydrochloric acid and digestive enzymes.

It is secreted by the glands in the stomach to aid in food digestion.