3. gamete production
4. sperm transported
near egg
1. Fertilization
2. Zygote forms
b) 3,4,1,2
Cell
It is the basic structural and functional unit of live.
Every organism is made up of the things tiny cell
Answer:
Explanation:
In simple diffusion, small molecules without charges such as oxygen and carbon dioxide flow through a plasma membrane without assistance and without expending energy. Other substances such as proteins, glucose and charged particles called ions cannot pass through the selectively permeable membrane.
Blood-Brain Barrier prevent material from moving in or out of the brain's capillaries.
What is blood-brain barrier?
- All of the body's tissues and organs depend on blood arteries to carry oxygen and nutrients to them.
- The blood-brain barrier, a special property of the blood arteries that vascularize the central nervous system (CNS), enables these vessels to tightly control the transit of ions, chemicals, and cells between the blood and the brain.
- Correct neuronal function is enabled by the careful regulation of CNS homeostasis, which also safeguards neural tissue from toxins and infections.
- Alterations to these barrier qualities play a significant role in the pathophysiology and development of various neurological illnesses.
Learn more about the blood brain barrier with the help of the given link:
brainly.com/question/4921837
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