Immune
What is the primary function of the immune system?
protect the body from harmful pathogens, such as bacteria, viruses, and fungi, and to eliminate abnormal or damaged cells.
What is the difference between arteries and veins in terms of their structure and function?
Arteries carry blood away from the heart, while veins carry blood toward the heart. Arteries have thicker walls and a more elastic structure to withstand the high pressure generated by the heart. Veins have thinner walls and contain valves to prevent backflow of blood.
What is the primary male reproductive organ responsible for producing sperm
testes
Define the term "tissue" in the context of biology.
Tissue refers to a group of cells that perform a specific function together in the body.
ur body is made up of ____ cells
10 trillion!!!!!! =0!
what is the first line of defense?
Innate immune system
Describe the structure and function of the four main components of blood.
Blood consists of plasma, red blood cells, white blood cells, and platelets. Plasma carries nutrients, hormones, and waste products. Red blood cells transport oxygen to tissues and remove carbon dioxide. White blood cells help fight infections. Platelets aid in blood clotting.
What is the name of the female reproductive organ where fertilization typically occurs?
What is the purpose of forming a hypothesis in the scientific method?
The purpose of forming a hypothesis is to propose a testable explanation or prediction for a phenomenon or observed data.
Wut do yellow and red marrow produce
2 lazy 2 write knwo answer in ma head
x2) What is the difference between innate immunity and adaptive immunity?
(Best answer gets the points*everyone answers*)
Innate immunity is the body's first line of defense against pathogens and is non-specific in nature. It includes physical barriers, such as the skin and mucous membranes, as well as cellular and chemical defenses. Adaptive immunity, on the other hand, is specific to particular pathogens and involves the production of antibodies and memory cells after exposure to a pathogen. It provides long-term protection against specific pathogens.
What is the name of the valve that separates the left ventricle from the aorta, preventing the backflow of blood into the heart? a) Tricuspid valve b) Pulmonary valve c) Aortic valve d) Mitral valve
c
muscle fiber get their signals from what
one motor unit
Explain the difference between an organ and an organ system.
An organ is a structure composed of multiple tissues working together to perform a specific function, while an organ system is a group of organs that work together to perform a particular physiological function or set of functions within an organism.
Differentiate between a prokaryotic and a eukaryotic cell.
too lazy 2 type
Describe the process of antigen presentation and how it triggers an immune response.
Antigen presentation involves the display of antigens (foreign substances) on the surface of antigen-presenting cells. When a T cell recognizes an antigen presented by an antigen-presenting cell, it becomes activated and initiates an immune response. This activation leads to the proliferation of T cells and the production of cytokines, which stimulate other immune cells and coordinate the immune response.
Which blood type is considered the "universal recipient"? A) A B) B C) AB D) O
c
What is the name of the structure in females where the fertilized egg implants and develops during pregnancy
uterus
Describe the difference between a dependent and an independent variable in an experiment.
The independent variable is the factor that is manipulated or changed by the researcher, while the dependent variable is the outcome or response that is measured and affected by changes in the independent variable.
name all function of bone (hint: there are 4 functions)
movement, protection, mineral storage, blood cell formation
Gimme the 8 steps to immune system response. (Everyone answers. the best answer gets the points)
1. Macrophages engulf pathogens
2. antigens on pathogens activate Helper T Cells
3. Helper t cells divide to make more helper T Cells
4.Helper T Cells call Killer T Cells to kill cells infected with pathogens
5. Helper T Cells activate B Cells who make millions of antibodies
6. Antibodies cling to pathogens
7. Proteins attach to antibodies and punch holels in pathogens
8. Macrophages engulf weakened pathogens
Which component of blood is responsible for clotting and preventing excessive bleeding? A) Red blood cells B) Platelets C) white blood cellsD) Plasma
b
What is the name of the tube that carries sperm from the testes to the urethra in males?
vas deferens
Explain the hierarchy of organization in multicellular organisms, starting from the simplest level to the most complex.
correct! or are u?????? =)
bonus true or false pink pinapple exist and yellow water mellon is also real?
true and true