Biology

Question 1

What does a Phospholipid bilayer do

Answer 1

The phospholipid bilayer allows the cell to be selectively permeable which means only letting certain things in and out

Question 2

What are proteins purpose within the membrane

Answer 2

Proteins are thought to be carrier molecules through the membrane

Question 3

What is the cell membranes purpose

Answer 3

The cell membranes main purpose is to protect the cell by regulating the movements of molecules in and out of the cell

Question 4

What is faster the nervous system or hormonal system (why)

Answer 4

The nervous system relies on electrical impulses to carry a signal whereas hormonal systems rely on slow blood circulation

Question 5

Define action potential

Answer 5

Action potential is where a rapid sequence of voltage changes across a membrane

Question 6

Define Synapsis

Answer 6

A synapse is a junction between two nerve cells consisting of a small gap in which impulse pass by

Question 7

Define stimuli

Answer 7

Stimuli is a thing that evokes a specific function in the organ or the tissue.

Question 8

What is a pathogen

Answer 8

A pathogen is an agent that causes disease, they are mainly cellular which are organism like bacteria, fungi, protozoans and different types of worms.

Question 9

Difference between an epidemic and an endemic

Answer 9

An epidemic is something that is spreading with a large amount of people within a community and an endemic is something that belong to a community or a particular people in a country.

Question 10

Difference between endo-parasites and ecto-parasites

Answer 10

Ectoparasites live outside of their hosts and endoparasites live within their hosts body

Question 11

how do bacterial diseases spread

Answer 11

Bacterial diseases spread through physical contact, airborne, droplets, vectors and vehicular

Question 12

How do pathogen enter the body

Answer 12

Pathogens can enter the body via natural opening or wounds and breaks in the skin. Each of the natural opening have a tube lined with soft moist membranes that are breeding ground for most pathogens.

Question 13

difference between innate and acquired immune systems

Answer 13

Innate immune systems are present in all organisms and is always working, it does not need assistance or any special preparation to prevent infection. Acquired immune systems have to be primed before it can be fully effective

Question 14

What is the equation for photosynthesis

Answer 14

6CO2 + 6H2O → C6H12O6 + 6O2. or carbon dioxide molecules and six water molecules, are converted by light energy captured by chlorophyll

Question 15

What consists inside a Eukaryotic cell

Answer 15

mitochondria, chloroplasts, the endoplasmic reticulum, the Golgi apparatus, and lysosomes

Question 16

determine the difference between prokaryotes and eukaryotes

Answer 16

eukaryotic cells have a membrane-bound nucleus and prokaryotic cells do not.

Question 17

Types of receptors

Answer 17

Photoreceptor (light), Baroreceptor (Blood PH), Thermoreceptor (temp), Mechanoreceptor (body position)

Question 18

What is transpiration

Answer 18

process of plants losing water, helps in the movements of minerals

Question 19

What is the xylem and what is phloem

Answer 19

Xylem is the tissue transports water and minerals from the roots to the leaves whereas the phloem tissue transports food from the leaves to the other parts of the plant.

Question 20

What does ADH stand for and what does it do

Answer 20

Antidiuretic Hormone regulate the amount of water in the body in the kidneys

Question 21

What is simple diffusion

Answer 21

the process by which molecules, atoms, or ions diffuse through a semipermeable membrane down their concentration gradient without the assistance of transporter proteins

Question 22

What is osmosis

Answer 22

the net movement of water across a semipermeable membrane

Question 23

What is facilitated diffusion

Answer 23

Facilitated diffusion is a type of passive transport that uses specialized proteins, such as channel proteins and carrier proteins, to help molecules move across a cell membrane

Question 24

What is active transport

Answer 24

the movement of molecules or ions across a cell membrane from a region of lower concentration to a region of higher concentration against the concentration gradient.

Question 25

What is hydrophilic and hydrophobic inside a phospholipid bilayer

Answer 25

hydrophilic head and hydrophobic tail