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What is a smooth Muscle?
The smooth muscle is is a muscle that moves food along your digestive system
Explain hinge joint
A hinge joint is a type of joint that allows movement in one direction only, like the opening and closing of a door.
wbcs have a ___________ shape
irregular
Describe how the nuclear model of the atom differs from the plum pudding model.
The plum pudding model described the atom as a sphere of positive charge with electrons scattered inside. The nuclear model proposed that atoms have a small, dense nucleus containing protons, with electrons orbiting around it. The nuclear model shows that most of the atom is empty space.
Describe the physical descrpition of a RBC
Biconcave disc, Red in color , Flexible due to circular shape
Muscles are attached to bones by __________
Muscles are attached to bones by tendons
the only way to cure sickle cell anemia is
bone marrow transplant
Explain the role of each of the four main components of blood.
Red blood cells carry oxygen around the body. White blood cells defend the body against infection. Plasma transports nutrients, hormones, carbon dioxide, and waste. Platelets help the blood to clot and prevent bleeding.
What is copper carbonate composed of
Copper{5},oxygen{4},Carbon{1}
Name 3 laws from daltons atomic theory
either - All matter is composed of atoms
- atoms cannot be divided u[ into smalloer particles nor can they be destroyed
-atoms of an element all have same mass and properties
- The atoms of diffrent elements have diffrent mass and diffrent properties
- atoms combine in simple whlole numbers to form compounds
What red pigment in red blood cells helps carry oxygen?
haemoglobin
Why are red blood cells shaped like discs with a dent in the middle? Give two reasons.
They have a biconcave shape to increase surface area for oxygen absorption and to easily pass through narrow capillaries.
______% of newborn babies have sickle cell anemia in nigeria
Explain the james chadwick experiment (im mewing cuz of the name lol-)
James Chadwick directed alpha particles at a beryllium target.
The beryllium emitted a highly penetrating radiation that was not deflected by electric or magnetic fields.
This showed the radiation had no charge, unlike protons or electrons. Chadwick concluded that the radiation was made of neutral particles, which he named neutrons.
Explain the importance of white blood cells and plasma in protecting the body and transporting substances.
White blood cells are important because they defend the body against pathogens such as bacteria and viruses by engulfing them or producing antibodies. This helps protect the body from infections and diseases. Plasma is the liquid part of blood that transports substances such as nutrients, hormones, carbon dioxide, and waste products around the body. It also helps distribute heat.
What are the three subatomic particles in an atom, where are they found, and what are their charges?
Protons are found in the nucleus and have a positive charge. Neutrons are also in the nucleus and have no charge. Electrons orbit the nucleus and have a negative charge.
explain antagonistic muscle pair with the exmaple of the biceps and triceps
When the Biceps and Triceps work together to raise and lower the arm they work together like this - when the arm is raised the biceps raise and contract whereas the triceps relax , when the arm is lowered - the triceps contract and the biceps relax hence earning the name antagonistic muscle pair
Explain the plum pudding analogy
The plum pudding model, proposed by J.J. Thomson, described the atom as a positively charged sphere with negatively charged electrons embedded within it, like plums in a pudding. This model suggested that the positive charge was spread out evenly throughout the atom. The electrons were thought to be scattered randomly inside the sphere to balance the charge. It was an early attempt to explain atomic structure after the discovery of the electron.
Compare the hinge joint and ball-and-socket joint in terms of movement and location.
ball and socket joints are a kind of joint where one end of the bone forms a ball shape and the other end forms a cup shaped socket allowing it to fit within and allow 360-degree movement whereas a hinge joint only allows back and forth movement due its shape resembling a door hinge, an example of a ball and socket joint is the shoulder that moves 360-degree like when you rotate your arm and an example of a hinge joint is the knee which moves back and forth like for example when you kick a ball.
Compare the plum pudding model and Rutherford’s nuclear model in terms of structure and experimental evidence.
The plum pudding model described the atom as a positively charged sphere with embedded electrons. It did not explain the structure of the nucleus. Rutherford’s gold foil experiment showed that some alpha particles were deflected at large angles, suggesting the atom has a small, dense, positively charged nucleus. Most alpha particles passed through, indicating atoms are mostly empty space. This led to the nuclear model, where electrons orbit a central nucleus.