BIOLOGY HIGH SCHOOL

The events of fertilization must occur in a specific sequence because it is a highly ordered process. Demonstrate your understanding of the proper event order by identifying the correct numerical order for these statements. Put the correct number on the blank in front of each statement. _____Semen is ejaculated into the vagina.
_____Prostate gland adds a fluid that protects the sperm.
_____Cell membrane changes electrical characteristics, causing cortical reaction.
_____Sperm migrate through cervix and into uterus.
_____Bulbourethral glands add a fluid that protect sperm from acidic conditions in the urethra.
_____Male and female chromosomes congregate, restoring the diploid (2n) number.
_____Seminal vesicles add a fluid that provides a source of energy for active sperm.
_____Acrosome releases enzymes that break down outer layer of egg’s membrane.
_____Muscles at the base of the bladder contract, forcing semen through the urethra.
_____Sperm is produced in the testes and stored in the epididymis.
_____Sperm encounter oocyte in oviduct (fallopian tube).
_____Sperm travel through the vas deferens to the seminal vesicles.

Answers

Answer 1
Answer:

Answer:

The correct sequence would be:

__1__Sperm is produced in the testes and stored in the epididymis.

__2__Sperm travel through the vas deferens to the seminal vesicles.

__3_Seminal vesicles add a fluid that provides a source of energy for active sperm.

__4__Bulbourethral glands add a fluid that protect sperm from acidic conditions in the urethra.

__5__Prostate gland adds a fluid that protects the sperm.

__6__Muscles at the base of the bladder contract, forcing semen through the urethra.

__7__Semen is ejaculated into the vagina.

__8__Sperm migrate through cervix and into uterus.

__9__Sperm encounter oocyte in oviduct (fallopian tube).

__10_Acrosome releases enzymes that break down outer layer of egg’s membrane.

__11_Cell membrane changes electrical characteristics, causing cortical reaction.

__12_Male and female chromosomes congregate, restoring the diploid (2n) number.

Fertilization is the process by which gametes of the male and female fuse with each other to form a zygote. In humans, it takes place inside the female body.

The events can be categorized as:

Pre-fertilization events: Sperm (or semen) in male and egg in the female is produced in testes (in males) and ovary (if females) respectively. Accessory glands such as seminal vesicle, bulbourethral, and prostate glands help in the formation of sperm in males.

Coitus: During this semen from a male is ejaculated into the vagina of a female with the help of erectile penis.

The semen then passes through the cervix to reach the uterus.

Fertilization: Four events take place to cause successful fertilization; sperm preparation (capacitation followed by acrosomal reaction), binding, a fusion of plasma membranes of sperm and egg, cortical reaction and activation of the egg.

Post-fertilization events: The zygote undergoes cleavage process to mature into an embryo.

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If u have no white blood cells left, what does this mean?

Answers

White blood cells fight infections from bacteria, viruses, fungi. and other pathogens (organisms that cause infection). One important type of white blood cell is the neutrophil. These cells are made in bone marrow and travel in the blood throughout the body. They sense infections, gather at sites of infection, and destroy the pathogens.

When the body has too few neutrophils, the condition is called neutropenia. This makes it harder for the body to fight off pathogens. As a result the person is more likely to get sick from infections. In general, an adult who has fewer than 1,000 neutrophils in a microliter of blood has neutropenia.

If the neutrophil count is very low, (fewer than 500 neutrophils in a microliter of blood), it is called severe neutropenia. When the neutrophil count gets this low, even the bacteria normally living in a person's mouth, skin, and gut can cause serious infections.
White blood cells fight bacteria so, with no white blood cells you have a higher risk of infection and a low white blood call count can give you Leukopenia  and Neutropenia

A symbiotic relationship in which one species benefits and the other is harmed but not immediately killed is known as?

Answers

Answer:

Parasitism.

Explanation:

A biological interaction explains the different relationship between the organism and their interaction in the environment. The different biological interaction are mutualism, ammensalism and parasitism.

Parasitism may be defined as the type of symbiotic relationship in which the organisms are associated with each other. The one species gets benefit from the other organism while the other organism is harmed but they are ot killed directly or immediately. This is a type of negative interaction.

Thus, the answer is parasitism.
It's called parasitism.

Abiotic factors, like water, are critical to most food chains.
a. True
b. False

Answers

Yes True

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Why was parallax a problem in proving the heliocentric model of the solar system?

Answers

Answer:

When we observe the position of a star its position changes over the course of a year. It will return to the same position a year after the first measurement. This effectively proves that the Earth is in orbit.

A weakened immune system may be caused by what?

Answers

I think the best answer is that there is a virus in the body.
smoking and taking drugs allows the immune system to get weak

The amount of food consumed in one eating occasion is termed the

Answers

Answer: Serving or Portion Size

Explanation: If not Serving or Portion Size, there's probably a more detailed answer like the RACC, but i'm confident its Potion Size.
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