Answer:
D
Explanation:
The hertz (symbol: Hz) is the derived unit of frequency in the International System of Units (SI) and is defined as one cycle per second.
Answer: Option B.
The heart senses an increase in blood pressure and secrete ANF to decrease blood pressure.
Explanation:
Intinstic regulation is when a cell, tissue or organ system can adjust and respond to change in environment on it's own. The intrinsic is inherent in organ meaning the organ can maintain homeostatis within itself.
For example, the heart can perform intrinsic regulation for it self. The heart can perform myogenic regulation by reacting and responding to increase or decrease in blood pressure to keep the blood flow in normal blood vessel constant. It is a sublevel to control cardiac function.
Alveoli have a rich supply of blood capillaries where diffusion of oxygen takes place . oxygen combines with haemoglobin to form oxyhaemoglobin which is then carried to different cells tissues and body parts.
so the structure is alveoli
Answer: fish has a central brain
B
Chromosomes contains genetic information